Home / 219,712.51-303,205.65-129,072.30

Finding the Fourth Proportional to 219,712.51, 303,205.65 and 129,072.30

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Solution

The fourth proportional to 219,712.51, 303,205.65 and 129,072.30 is: 178,121.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,712.51 : 303,205.65 = 129,072.30 : x
  2. Step 2: Convert to fraction form
    219,712.51/303,205.65 = 129,072.30/x
  3. Step 3: Cross multiply
    219,712.51x = 303,205.65 × 129,072.30
  4. Step 4: Simplify right side
    219,712.51x = 39,135,449,102.47
  5. Step 5: Solve for x
    x = 39,135,449,102.47/219,712.51
  6. Step 6: Final answer
    x = 178,121.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.